A photoelectrophoretic image display system with a photoconductor electrode

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Abstract
A novel image display system based upon the photoelectrophoretic phenomenon is studied. The display cell consists of a sandwich structure of an electrode‐photoconductor layer‐suspension (particles and suspending fluid)‐counter electrode. A visual image is produced by three steps: (1) application of external voltage, (2) exposure to an optical image while the voltage is applied, and (3) a short circuiting of the cell. An important feature of this system is that during this operation a charge exchange between particles and electrodes is not required in exposed areas. In addition, this system permits the employment of less photosensitive particles. The effects of the photoconductor layer thickness, light intensity, external voltage, and fluid component on optical characteristics are studied. The forces acting on particles during this operation are also discussed.

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